mirror of
https://git.fightbot.fun/hxuanyu/BingPaper.git
synced 2026-02-15 07:29:33 +08:00
493 lines
15 KiB
Go
493 lines
15 KiB
Go
package handlers
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"strings"
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"BingPaper/internal/config"
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"BingPaper/internal/model"
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"BingPaper/internal/service/image"
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"BingPaper/internal/storage"
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"BingPaper/internal/util"
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"github.com/gin-gonic/gin"
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"go.uber.org/zap"
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)
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type ImageVariantResp struct {
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Variant string `json:"variant"`
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Format string `json:"format"`
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Size int64 `json:"size"`
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URL string `json:"url"`
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StorageKey string `json:"storage_key"`
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}
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type ImageMetaResp struct {
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Date string `json:"date"`
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Mkt string `json:"mkt"`
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Title string `json:"title"`
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Copyright string `json:"copyright"`
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CopyrightLink string `json:"copyrightlink"`
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Quiz string `json:"quiz"`
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StartDate string `json:"startdate"`
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FullStartDate string `json:"fullstartdate"`
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HSH string `json:"hsh"`
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Variants []ImageVariantResp `json:"variants"`
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}
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// GetToday 获取今日图片
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// @Summary 获取今日图片
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// @Description 根据参数返回今日必应图片流或重定向
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// @Tags image
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Param variant query string false "分辨率 (UHD, 1920x1080, 1366x768, 1280x720, 1024x768, 800x600, 800x480, 640x480, 640x360, 480x360, 400x240, 320x240)" default(UHD)
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// @Param format query string false "格式 (jpg)" default(jpg)
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// @Produce image/jpeg
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// @Success 200 {file} binary
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/today [get]
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func GetToday(c *gin.Context) {
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mkt := c.Query("mkt")
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img, err := image.GetTodayImage(mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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handleImageResponse(c, img, 7200) // 2小时
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}
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// GetTodayMeta 获取今日图片元数据
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// @Summary 获取今日图片元数据
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// @Description 获取今日必应图片的标题、版权等元数据
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// @Tags image
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Produce json
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// @Success 200 {object} ImageMetaResp
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/today/meta [get]
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func GetTodayMeta(c *gin.Context) {
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mkt := c.Query("mkt")
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img, err := image.GetTodayImage(mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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c.Header("Cache-Control", "public, max-age=7200") // 2小时
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c.JSON(http.StatusOK, formatMeta(img))
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}
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// GetRandom 获取随机图片
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// @Summary 获取随机图片
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// @Description 随机返回一张已抓取的图片流或重定向
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// @Tags image
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Param variant query string false "分辨率" default(UHD)
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// @Param format query string false "格式" default(jpg)
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// @Produce image/jpeg
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// @Success 200 {file} binary
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/random [get]
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func GetRandom(c *gin.Context) {
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mkt := c.Query("mkt")
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img, err := image.GetRandomImage(mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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handleImageResponse(c, img, 0) // 禁用缓存
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}
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// GetRandomMeta 获取随机图片元数据
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// @Summary 获取随机图片元数据
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// @Description 随机获取一张已抓取图片的元数据
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// @Tags image
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Produce json
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// @Success 200 {object} ImageMetaResp
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/random/meta [get]
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func GetRandomMeta(c *gin.Context) {
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mkt := c.Query("mkt")
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img, err := image.GetRandomImage(mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
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c.JSON(http.StatusOK, formatMeta(img))
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}
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// GetByDate 获取指定日期图片
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// @Summary 获取指定日期图片
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// @Description 根据日期返回图片流或重定向 (yyyy-mm-dd)
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// @Tags image
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// @Param date path string true "日期 (yyyy-mm-dd)"
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Param variant query string false "分辨率" default(UHD)
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// @Param format query string false "格式" default(jpg)
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// @Produce image/jpeg
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// @Success 200 {file} binary
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/date/{date} [get]
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func GetByDate(c *gin.Context) {
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date := c.Param("date")
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mkt := c.Query("mkt")
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img, err := image.GetImageByDate(date, mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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handleImageResponse(c, img, 604800) // 7天
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}
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// GetByDateMeta 获取指定日期图片元数据
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// @Summary 获取指定日期图片元数据
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// @Description 根据日期获取图片元数据 (yyyy-mm-dd)
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// @Tags image
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// @Param date path string true "日期 (yyyy-mm-dd)"
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Produce json
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// @Success 200 {object} ImageMetaResp
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// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
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// @Router /image/date/{date}/meta [get]
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func GetByDateMeta(c *gin.Context) {
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date := c.Param("date")
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mkt := c.Query("mkt")
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img, err := image.GetImageByDate(date, mkt)
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if err != nil {
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sendImageNotFound(c, mkt)
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return
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}
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c.Header("Cache-Control", "public, max-age=604800") // 7天
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c.JSON(http.StatusOK, formatMeta(img))
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}
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// ListImages 获取图片列表
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// @Summary 获取图片列表
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// @Description 分页获取已抓取的图片元数据列表。支持分页(page, page_size)、限制数量(limit)和按月份过滤(month, 格式: YYYY-MM)。
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// @Tags image
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// @Param limit query int false "限制数量 (如果不使用分页)" default(30)
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// @Param page query int false "页码 (从1开始)"
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// @Param page_size query int false "每页数量"
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// @Param month query string false "按月份过滤 (格式: YYYY-MM)"
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// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
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// @Produce json
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// @Success 200 {array} ImageMetaResp
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// @Router /images [get]
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func ListImages(c *gin.Context) {
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limitStr := c.Query("limit")
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pageStr := c.Query("page")
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pageSizeStr := c.Query("page_size")
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month := c.Query("month")
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mkt := c.Query("mkt")
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// 记录请求参数，便于排查过滤失效问题
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util.Logger.Debug("ListImages parameters",
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zap.String("month", month),
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zap.String("mkt", mkt),
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zap.String("page", pageStr),
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zap.String("page_size", pageSizeStr),
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zap.String("limit", limitStr))
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var limit, offset int
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if pageStr != "" && pageSizeStr != "" {
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page, _ := strconv.Atoi(pageStr)
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pageSize, _ := strconv.Atoi(pageSizeStr)
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if page < 1 {
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page = 1
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}
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if pageSize < 1 {
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pageSize = 30
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}
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limit = pageSize
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offset = (page - 1) * pageSize
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} else {
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if limitStr == "" {
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limit = 30
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} else {
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limit, _ = strconv.Atoi(limitStr)
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}
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offset = 0
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}
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images, err := image.GetImageList(limit, offset, month, mkt)
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if err != nil {
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util.Logger.Error("ListImages service call failed", zap.Error(err))
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c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
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return
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}
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result := []gin.H{}
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for _, img := range images {
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result = append(result, formatMetaSummary(&img))
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}
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c.JSON(http.StatusOK, result)
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}
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// ListGlobalTodayImages 获取所有地区的今日图片列表
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// @Summary 获取所有地区的今日图片列表
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// @Description 获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）
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// @Tags image
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// @Produce json
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// @Success 200 {array} ImageMetaResp
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// @Router /images/global/today [get]
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func ListGlobalTodayImages(c *gin.Context) {
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images, err := image.GetAllRegionsTodayImages()
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if err != nil {
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util.Logger.Error("ListGlobalTodayImages service call failed", zap.Error(err))
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c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
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return
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}
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result := []gin.H{}
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for _, img := range images {
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result = append(result, formatMetaSummary(&img))
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}
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c.JSON(http.StatusOK, result)
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}
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func sendImageNotFound(c *gin.Context, mkt string) {
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cfg := config.GetConfig().API
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message := "image not found"
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if mkt != "" {
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reasons := []string{}
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if !util.IsValidRegion(mkt) {
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reasons = append(reasons, fmt.Sprintf("[%s] is not a standard region code", mkt))
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} else {
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if !cfg.EnableOnDemandFetch {
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reasons = append(reasons, "on-demand fetch is disabled")
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}
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if !cfg.EnableMktFallback {
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reasons = append(reasons, "region fallback is disabled")
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}
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}
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if len(reasons) > 0 {
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message = fmt.Sprintf("Image not found for region [%s]. Reasons: %s.", mkt, strings.Join(reasons, ", "))
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} else {
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message = fmt.Sprintf("Image not found for region [%s] even after on-demand fetch and fallback attempts.", mkt)
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}
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}
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c.JSON(http.StatusNotFound, gin.H{"error": message})
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}
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func handleImageResponse(c *gin.Context, img *model.Image, maxAge int) {
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variant := c.DefaultQuery("variant", "UHD")
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format := c.DefaultQuery("format", "jpg")
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var selected *model.ImageVariant
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for _, v := range img.Variants {
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if v.Variant == variant && v.Format == format {
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selected = &v
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break
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}
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}
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if selected == nil && len(img.Variants) > 0 {
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// 回退逻辑
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selected = &img.Variants[0]
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}
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if selected == nil {
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c.JSON(http.StatusNotFound, gin.H{"error": "variant not found"})
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return
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}
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mode := config.GetConfig().API.Mode
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if mode == "redirect" {
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if selected.PublicURL != "" {
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if maxAge > 0 {
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c.Header("Cache-Control", fmt.Sprintf("public, max-age=%d", maxAge))
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} else {
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c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
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}
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c.Redirect(http.StatusFound, selected.PublicURL)
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} else if img.URLBase != "" {
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// 兜底重定向到原始 Bing
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bingURL := fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, selected.Variant)
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if maxAge > 0 {
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c.Header("Cache-Control", fmt.Sprintf("public, max-age=%d", maxAge))
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} else {
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c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
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}
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c.Redirect(http.StatusFound, bingURL)
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} else {
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serveLocal(c, selected.StorageKey, img.Date, maxAge)
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}
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} else {
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serveLocal(c, selected.StorageKey, img.Date, maxAge)
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}
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}
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func serveLocal(c *gin.Context, key string, etag string, maxAge int) {
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if etag != "" {
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c.Header("ETag", fmt.Sprintf("\"%s\"", etag))
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if c.GetHeader("If-None-Match") == fmt.Sprintf("\"%s\"", etag) {
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c.AbortWithStatus(http.StatusNotModified)
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return
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}
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}
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reader, contentType, err := storage.GlobalStorage.Get(context.Background(), key)
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if err != nil {
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util.Logger.Error("Failed to get image from storage", zap.String("key", key), zap.Error(err))
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get image"})
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return
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}
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defer reader.Close()
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if contentType != "" {
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c.Header("Content-Type", contentType)
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}
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if maxAge > 0 {
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c.Header("Cache-Control", fmt.Sprintf("public, max-age=%d", maxAge))
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} else {
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c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
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}
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io.Copy(c.Writer, reader)
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}
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func formatMetaSummary(img *model.Image) gin.H {
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cfg := config.GetConfig()
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// 找到最小的变体（Size 最小）
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var smallest *model.ImageVariant
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for i := range img.Variants {
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v := &img.Variants[i]
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if smallest == nil || v.Size < smallest.Size {
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smallest = v
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}
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}
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variants := []gin.H{}
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if smallest != nil {
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url := smallest.PublicURL
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if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
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url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, smallest.Variant)
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} else if cfg.API.Mode == "local" || url == "" {
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url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, smallest.Variant, smallest.Format, img.Mkt)
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}
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variants = append(variants, gin.H{
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"variant": smallest.Variant,
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"format": smallest.Format,
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"size": smallest.Size,
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"url": url,
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"storage_key": smallest.StorageKey,
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})
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}
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return gin.H{
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"date": img.Date,
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"mkt": img.Mkt,
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"title": img.Title,
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"copyright": img.Copyright,
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"copyrightlink": img.CopyrightLink,
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"quiz": img.Quiz,
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"startdate": img.StartDate,
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"fullstartdate": img.FullStartDate,
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"hsh": img.HSH,
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"variants": variants,
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}
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}
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func formatMeta(img *model.Image) gin.H {
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cfg := config.GetConfig()
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variants := []gin.H{}
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for _, v := range img.Variants {
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url := v.PublicURL
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if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
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url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, v.Variant)
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} else if cfg.API.Mode == "local" || url == "" {
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url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, v.Variant, v.Format, img.Mkt)
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}
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variants = append(variants, gin.H{
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"variant": v.Variant,
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"format": v.Format,
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"size": v.Size,
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"url": url,
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"storage_key": v.StorageKey,
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})
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}
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return gin.H{
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"date": img.Date,
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"mkt": img.Mkt,
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"title": img.Title,
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"copyright": img.Copyright,
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"copyrightlink": img.CopyrightLink,
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"quiz": img.Quiz,
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"startdate": img.StartDate,
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"fullstartdate": img.FullStartDate,
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"hsh": img.HSH,
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"variants": variants,
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}
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}
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// GetRegions 获取支持的地区列表
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// @Summary 获取支持的地区列表
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// @Description 返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。
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// @Tags image
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// @Produce json
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// @Success 200 {array} util.Region
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// @Router /regions [get]
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func GetRegions(c *gin.Context) {
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cfg := config.GetConfig()
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pinned := cfg.Fetcher.Regions
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if len(pinned) == 0 {
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// 如果没有配置抓取地区，返回所有支持的地区
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c.JSON(http.StatusOK, util.AllRegions)
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return
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}
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// 创建一个 Map 用于快速查找配置的地区
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pinnedMap := make(map[string]bool)
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for _, v := range pinned {
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pinnedMap[v] = true
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}
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// 只返回配置中的地区，并保持配置中的顺序
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var result []util.Region
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// 为了保持配置顺序，我们遍历 pinned 而不是 AllRegions
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for _, pVal := range pinned {
|
||
for _, r := range util.AllRegions {
|
||
if r.Value == pVal {
|
||
result = append(result, r)
|
||
break
|
||
}
|
||
}
|
||
}
|
||
|
||
// 如果配置了一些不在 AllRegions 里的 mkt，上述循环可能漏掉
|
||
// 但根据之前的逻辑，AllRegions 是已知的 17 个地区。
|
||
// 如果用户配置了 fr-CA (不在 17 个内)，我们也应该返回它吗？
|
||
// 需求说 "前端页面对地区进行约束"，如果配置了，前端就该显示。
|
||
// 如果不在 AllRegions 里的，我们直接返回原始编码作为 label 或者查找一下。
|
||
|
||
if len(result) < len(pinned) {
|
||
// 补全不在 AllRegions 里的地区
|
||
for _, pVal := range pinned {
|
||
found := false
|
||
for _, r := range result {
|
||
if r.Value == pVal {
|
||
found = true
|
||
break
|
||
}
|
||
}
|
||
if !found {
|
||
result = append(result, util.Region{Value: pVal, Label: pVal})
|
||
}
|
||
}
|
||
}
|
||
|
||
c.JSON(http.StatusOK, result)
|
||
}
|